user
Write a response that appropriately completes the request.

### Instruction:
Identify a political decision that affected a significant population.

### Response:
assistant
In 2018, the Supreme Court of the United States ruled that the Trump administration’s travel ban, targeting certain countries, was constitutional. This decision was hugely consequential, as the travel ban blocked more than 135 million people from entering the United States. The ban had a huge impact on multiple populations, as many people were unable to travel to the United States for both business and leisure purposes.